<!DOCTYPE html>
<html>
<head>
    <style>
        body {
            height: 300px;
        }
        #div {
            position: relative;
            float: left;
            z-index: 10;
        }
        span {
            display: inline-block;
            border: 1px solid black;
        }
        span:hover {
            color: green;
        }
    </style>
</head>
<body>
<div id="div">
<span>This text should be in a box</span>
</div>
</body>
</html>
